Bradlin

I know that there are other threads on this but I thought that I would start a fresh one. Which octane would you recommend ( I am sure that 93 is best, but is it necessary)? My car is "Non Turbo". I started using 89, but thought that I would check with the experts. Thanks for all your help.

trent1059

My car runs great on the cheap stuff,87 octane i think is what I use. no problems, good power, no knocking and it is somewhat cheaper that 89 or 91. here in texas gas is now 219 a gallon for 87 regular unleaded at the station I use.
89 and 91 are 229 and 239 a gal.

Audiofight

Hell

87 octane was $2.43 a gallon here a couple days ago.....came down to $2.39 yesterday

I also run the 87 octane and my NA runs perfect. I have tried running 89 and 93 octane and haven't noticed any improvements. Maybe 1 mpg better mileage, but that is a guess. No noticable power gains or anything. Spend the extra money on a quality oil filter and run cheap gas. Better oil pressure means more to me than more expensive fuel.

Bradlin

Thanks for your help, with these prices I will try the 87!!

IaMtHeRuThLeSs1

you will not gain ANY power or mpg with a higher octane fuel, the car is tuned for use w/ 87 octane, if you use a higher octane (thus increasing the tempurature at which it detonates) the car will start to retard timing, So...you LOSE power using a higher octane fuel in a n/a engine, unless it was specifically tuned for it. Cars with boost need the higher octane to keep from detonating.

So unless you're boosted, stick with 87.

Aaron Cake

iTrader: (1)

Low octane (86,87, etc.) on NA, higher (89+) on turbo.

jgrewe

iTrader: (1)

Spent a lot of time on a dyno with an IT car and EProd car. 87 for both, no power gains with higher stuff. If I remember we used it in a GT3 car a long time ago too.